PLATE LXXII A. CASCADING GLACIER 'mots. THE NUNATAK Showing hanging-valley conditions, the cascading of ice from ledge to ledge, and the ice sculpturing of the steepened valley slope, down which the water from the melting ice rung in numerous courses on the face of lie rock (dark bands) without forming valleys. Photograph taken July 24, 1905. B. FRONT or HIDDEN GLACIER IN 1899 Outwash plain in foreground. Photograph by G. K. Gilbert.